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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Environmental fate & pathways

Endpoint summary

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Administrative data

Description of key information

If released to the atmosphere, vapour phase MMT(EHTG) will be degraded by photochemically induced hydroxyl radicals, with a half-life of ca. 9.4 hrs. A Henry’s Law constant of 4.598E-06 predicts that MMT(EHTG) will volatilise only minimally from surface water; half-lives from a model river or lake are 350 hours and 168.6 days, respectively. Based on Level III distribution modelling it is estimated that the majority of MMT(EHTG) released to the environment will partition into soil (65.7 %) and sediment (17.4 %), with a somewhat smaller amount in water (16.5 %).

However, due to expected rapid decomposition which would occur upon contact with water in these media, the extent of inter-media exchange would be expected to be much less than indicated by the distribution models.

Additional information